Clinical Research Directory

Inclusion Criteria: 1. Male or female participants aged 18 to 50 years (inclusive at the time of signing the informed consent form). 2. Body mass index (BMI) = weight (kg) / height squared (m²): SAD part: 19.0 to 29.9 kg/m² (inclusive), with body weight ≥ 55 kg (male) or ≥ 50 kg (female); MAD part: 24.0 to 37.5 kg/m² (inclusive), with body weight ≥ 70 kg (male) or ≥ 60 kg (female). 3. Resting heart rate/pulse ≥ 55 beats/min and ≤ 90 beats/min at screening and before randomization. Exclusion Criteria: 1. History of severe drug allergy (especially known or suspected allergy to the excipients of MWN109 tablets), severe atopic allergic disease/history (e.g., asthma, urticaria, eczematous dermatitis), or a severe allergic constitution. 2. History of acute or chronic pancreatitis, symptomatic gallbladder disease, pancreatic injury, or other high-risk factors that may lead to pancreatitis, or amylase or lipase \> 1.5 times the upper limit of normal (ULN) at screening. 3. Family history or history of medullary thyroid carcinoma; history of thyroid insufficiency or abnormal thyroid hormone levels. 4. Gastrointestinal diseases present at screening that may increase participant risk, such as abnormal gastric emptying (e.g., gastroparesis, pyloric stenosis, pyloric obstruction) or severe chronic gastrointestinal diseases (e.g., history of intestinal obstruction, active ulcer within 6 months). 5. History of infectious disease within 4 weeks prior to screening (which, in the investigator's judgment, may significantly affect the safety evaluation of the participant), or severe trauma or major surgery within 3 months. 6. History of severe arrhythmia prior to screening judged by the investigator as unsuitable for participation in this study. 7. Any of the following abnormal laboratory findings at screening: a) fasting blood glucose ≥ 7.0 mmol/L or \< 3.9 mmol/L, or HbA1c \> 6.5%; b) estimated glomerular filtration rate (eGFR) \< 90 mL/min/1.73 m²; c) triglycerides (TG) ≥ 5.65 mmol/L. 8. Blood donation, significant blood loss (\> 400 mL), or receipt of blood transfusion within 3 months prior to screening.